<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>计算</title>
</head>
<body>
    <div>
        <form action="http://localhost:8080/calc/add">
            num1:<input type="text">+
            num2:<input type="text">
            <button type="submit">add</button>
        </form>

    </div>
</body>
</html>